MySQL in memory

[randyboy]

Hi,

  I'm looking into the prospects of running a MySQL db out a RAM disk.  I
guess the simplest way of doing that would be to copy the db files into
memory and starting MySQL using the files in memory.  However, I run into
problems with having to update both the db files in memory and the db
files on disk while the system is running.  I suppose that also requires
me to run a second instance of MySQL in order to manipulate the db files
on disk.  How have other implemented a db in RAMdisk?  Is there (hopefully
there is) a better way than what I've just described?

tia
r.